<template>
  <view>
    <!-- 使用自定义搜索组件 -->
    <!-- 使用组件时可自己修改颜色和圆角 -->
    <!-- <my-search :bgColor="'pink'" :radius="5+'px'"></my-search> -->
    <my-search @click="goToSearch"></my-search>
    <view class="scroll-view-container">
      <!-- 左侧滑动区域 -->
      <scroll-view scroll-y="true" :style="{height: wh + 'px'}" class="left-scroll-view">
        <block v-for="(item,i) in cateList" :key="i">
          <view :class="['left-scroll-view-item', i == active ? 'active' : '']" @click="activeChange(i)">
            {{item.cat_name}}
          </view>
        </block>
      </scroll-view>
      <!-- 右侧滑动区域 -->
      <scroll-view scroll-y="true" :style="{height: wh + 'px'}" :scroll-top="scrollTop" class="right-scroll-view">

        <view class="cate-lv2" v-for="(item2,i2) in cateLevel2" :key="i2">
          <!-- 二级分类的标题 -->
          <view class="cate-lv2-title">/ {{item2.cat_name}} /</view>
          <!-- 三级分类 -->
          <view class="cate-lv3-list">
            <!-- 三级分类的每一项 -->
            <view class="cate-lv3-item" v-for="(item3,i3) in item2.children" :key="i3" @click="goToGoodsList(item3)">
              <image :src="item3.cat_icon"></image>
              <text>{{item3.cat_name}}</text>
            </view>
          </view>
        </view>
      </scroll-view>
    </view>
  </view>
</template>

<script>
  import badgeMix from '@/mixins/tabbar-badge.js'
  export default {
    mixins: [badgeMix],
    data() {
      return {
        wh: 0, //可用高度
        active: 0,
        cateList: [],
        cateLevel2: [], //二级分类
        scrollTop: 0
      };
    },
    methods: {
      //获取分类列表数据
      async getCateList() {
        const {
          data: res
        } = await uni.$http.get('https://api-ugo-web.itheima.net/api/public/v1/categories')
        console.log(res);
        if (res.meta.status !== 200) return uni.$showMsg();
        res.message.forEach(level => {
          level.children.forEach(level2 => {
            if(level2.children !== undefined) {
              level2.children.forEach(level3 => {
                // console.log(level3);
                level3.cat_icon = level3.cat_icon.replace('dev','web')
              })
            }
            else {
              // console.log('@@@',level2);
              level2.cat_icon = level2.cat_icon.replace('dev','web')
            }
          })
        })
        this.cateList = res.message
        this.cateLevel2 = res.message[0].children
      },
      activeChange(i) {
        this.active = i
        this.cateLevel2 = this.cateList[i].children
        this.scrollTop = this.scrollTop == 0 ? 1 : 0
      },
      goToGoodsList(item) {
        uni.navigateTo({
          url: '/subpkg/goods_list/goods_list?cid=' + item.cat_id
        })
      },
      goToSearch() {
        uni.navigateTo({
          url: '/subpkg/search/search'
        })
      }
    },
    onLoad() {
      const sysInfo = uni.getSystemInfoSync()
      // console.log(sysInfo);
      this.wh = sysInfo.windowHeight - 50
      this.getCateList()
    }
  }
</script>

<style lang="scss">
  .scroll-view-container {
    display: flex;
  }

  .left-scroll-view {
    width: 120px;
  }

  .left-scroll-view-item {
    background-color: #f7f7f7;
    line-height: 60px;
    text-align: center;
    font-size: 12px;

    &.active {
      background-color: #ffffff;
      position: relative;

      &::before {
        content: "";
        display: block;
        width: 3px;
        height: 30px;
        background-color: #C00000;
        position: absolute;
        top: 50%;
        left: 0;
        transform: translateY(-50%);
      }
    }
  }
.right-scroll-view {
  background-color: #FFFFFF;
}
  .cate-lv2-title {
    font-size: 12px;
    font-weight: bold;
    text-align: center;
    padding: 15px 0;
  }

  .cate-lv3-list {
    display: flex;
    flex-wrap: wrap;

    .cate-lv3-item {
      width: 33.33%;
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      margin-bottom: 10px;

      image {
        width: 60px;
        height: 60px;
        background-color: #f7f7f7;
      }

      text {
        font-size: 12px;
      }
    }
  }
</style>
